Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “idea”


noun [C] (SUGGESTION)   /ɑɪˈdi·ə/
a suggestion, thought, or plan: "Let’s go swimming." "Good idea!" She’s full of bright ideas.
(Definition of idea noun (SUGGESTION) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of idea

More American English definitions for “idea”

Definitions of “idea” in other dictionaries

Word of the Day

pump iron

to lift heavy weights for exercise

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More